Feixas G, Saúl LA, Avila-Espada A Viewing Cognitive Conflicts as Dilemmas: Implications for Mental Health. J Constr Psychol. 2009 Apr;22(2):141-169. Epub 2009 Feb 18.
Feixas G, Saúl LA The Multi-Center Dilemma Project: an investigation on the role of cognitive conflicts in health. Span J Psychol. 2004 May;7(1):69-78.
Montesano A, López-González MA, Saúl LA, Feixas G A review of cognitive conflicts research: a meta-analytic study of prevalence and relation to symptoms. Neuropsychiatr Dis Treat. 2015 Dec 4;11:2997-3006. doi: 10.2147/NDT.S91861. eCollection 2015. Review.
Paz C, Montesano A, Winter D, Feixas G Cognitive conflict resolution during psychotherapy: Its impact on depressive symptoms and psychological distress. Psychother Res. 2019 Jan;29(1):45-57. doi: 10.1080/10503307.2017.1405172. Epub 2017 Nov 26.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
